Transmission with a steplessly adjustable transmission ratio, with or without branched power and with or without an electrical machine

US7311629B2 · kind B2 · utility

Assignee

• LuK Lamellen und Kupplungsbau Beteiligungs KG · DE

Inventors

• Martin Vornehm · Neu-Anspach, DE
• Christian Lauinger · Baden-Baden, DE
• Hartmut Faust · Bogen, DE
• Michael Reuschel · Ottersweier, DE

Key dates

• Filing date: Dec 22, 2003
• Grant date: Dec 25, 2007
• Expiry date: Oct 16, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19144
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A branched power transmission having several transmission ratio ranges with a steplessly adjustable transmission ratio. A drive shaft is connected to both shafts of a variable speed unit through a distributor transmission, which shafts in turn are connected with the input shafts of a parallel gearbox through respective clutches. Two transmission ratio ranges differ from each other through the transmission ratio of an input shaft of the parallel gearbox and its output shaft. Additionally, the power-producing transmission can include an electrical machine. A further embodiment includes a variable speed unit, a first planetary transmission connected with a drive shaft, the input shaft of the variable speed unit and a connecting shaft, and a second planetary transmission that is connected with the connecting shaft of the output shaft of the variable speed unit and an output shaft, and an electrical machine that is non-rotatably connected with the connecting shaft.